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(#) Missing Disposable handling: Apply AutoDispose or cache the Disposable instance manually and enable lenient mode

!!! ERROR: Missing Disposable handling: Apply AutoDispose or cache the Disposable instance manually and enable lenient mode
   This is an error.

Id
:   `AutoDispose`
Summary
:   Missing Disposable handling: Apply AutoDispose or cache the Disposable instance manually and enable lenient mode
Severity
:   Error
Category
:   Correctness
Platform
:   Any
Vendor
:   Uber
Identifier
:   AutoDispose
Feedback
:   https://github.com/uber/AutoDispose/issues
Min
:   Lint 8.0 and 8.1
Compiled
:   Lint 8.0 and 8.1
Artifact
:   [com.uber.autodispose2:autodispose-lint](com_uber_autodispose2_autodispose-lint.md.html)
Since
:   2.1.0
Affects
:   Kotlin and Java files and test sources
Editing
:   This check runs on the fly in the IDE editor
Implementation
:   [Source Code](https://github.com/uber/AutoDispose/tree/main/static-analysis/autodispose-lint/src/main/kotlin/autodispose2/lint/AutoDisposeDetector.kt)
Tests
:   [Source Code](https://github.com/uber/AutoDispose/tree/main/static-analysis/autodispose-lint/src/test/kotlin/autodispose2/lint/AutoDisposeDetectorTest.kt)
Copyright Year
:   2019

You're subscribing to an observable but not handling its subscription.
This can result in memory leaks. You can avoid memory leaks by appending
`.as(autoDisposable(this))` before you subscribe or cache the Disposable
instance manually and enable lenient mode. More:
https://github.com/uber/AutoDispose/wiki/Lint-Check.

(##) Example

Here is an example of lint warnings produced by this check:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~text
src/foo/MyActivity.kt:10:Error:  [AutoDispose]
      Observable.just(1).subscribe()
      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/foo/MyActivity.kt:12: Error:  [AutoDispose]
    Observable.just(2).subscribe()
    ------------------------------
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Here is the source file referenced above:

`src/foo/MyActivity.kt`:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~kotlin linenumbers
package foo
import androidx.appcompat.app.AppCompatActivity
import io.reactivex.rxjava3.core.Observable
import io.reactivex.rxjava3.disposables.CompositeDisposable

class MyActivity: AppCompatActivity {
  private val disposables = CompositeDisposable()
  fun doSomething(flag: Boolean) {
    if (flag) {
      Observable.just(1).subscribe()
    } else {
      Observable.just(2).subscribe()
    }
  }
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

You can also visit the
[source code](https://github.com/uber/AutoDispose/tree/main/static-analysis/autodispose-lint/src/test/kotlin/autodispose2/lint/AutoDisposeDetectorTest.kt)
for the unit tests for this check to see additional scenarios.

The above example was automatically extracted from the first unit test
found for this lint check, `AutoDisposeDetector.checkLenientLintInIfExpression`.
To report a problem with this extracted sample, visit
https://github.com/uber/AutoDispose/issues.

(##) Including

!!!
   This is not a built-in check. To include it, add the below dependency
   to your project. This lint check is included in the lint documentation,
   but the Android team may or may not agree with its recommendations.

```
// build.gradle.kts
lintChecks("com.uber.autodispose2:autodispose-lint:2.2.1")

// build.gradle
lintChecks 'com.uber.autodispose2:autodispose-lint:2.2.1'

// build.gradle.kts with version catalogs:
lintChecks(libs.autodispose.lint)

# libs.versions.toml
[versions]
autodispose-lint = "2.2.1"
[libraries]
# For clarity and text wrapping purposes the following declaration is
# shown split up across lines, but in TOML it needs to be on a single
# line (see https://github.com/toml-lang/toml/issues/516) so adjust
# when pasting into libs.versions.toml:
autodispose-lint = {
    module = "com.uber.autodispose2:autodispose-lint",
    version.ref = "autodispose-lint"
}
```

2.2.1 is the version this documentation was generated from;
there may be newer versions available.

[Additional details about com.uber.autodispose2:autodispose-lint](com_uber_autodispose2_autodispose-lint.md.html).
(##) Suppressing

You can suppress false positives using one of the following mechanisms:

* Using a suppression annotation like this on the enclosing
  element:

  ```kt
  // Kotlin
  @Suppress("AutoDispose")
  fun method() {
     subscribe(...)
  }
  ```

  or

  ```java
  // Java
  @SuppressWarnings("AutoDispose")
  void method() {
     subscribe(...);
  }
  ```

* Using a suppression comment like this on the line above:

  ```kt
  //noinspection AutoDispose
  problematicStatement()
  ```

* Using a special `lint.xml` file in the source tree which turns off
  the check in that folder and any sub folder. A simple file might look
  like this:
  ```xml
  &lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;lint&gt;
      &lt;issue id="AutoDispose" severity="ignore" /&gt;
  &lt;/lint&gt;
  ```
  Instead of `ignore` you can also change the severity here, for
  example from `error` to `warning`. You can find additional
  documentation on how to filter issues by path, regular expression and
  so on
  [here](https://googlesamples.github.io/android-custom-lint-rules/usage/lintxml.md.html).

* In Gradle projects, using the DSL syntax to configure lint. For
  example, you can use something like
  ```gradle
  lintOptions {
      disable 'AutoDispose'
  }
  ```
  In Android projects this should be nested inside an `android { }`
  block.

* For manual invocations of `lint`, using the `--ignore` flag:
  ```
  $ lint --ignore AutoDispose ...`
  ```

* Last, but not least, using baselines, as discussed
  [here](https://googlesamples.github.io/android-custom-lint-rules/usage/baselines.md.html).

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